If it is wiggling back and forth in a direction perpendicular to the display (forward and backward with the display open), then you may be able to fix it by tightening some hidden screws.
Sadly, there appears to be no pictures in the guide here, and I don't have that model to show you myself.
Once you remove the display assembly, you just need to remove the clutch barrel (the black plastic piece covering the center bottom portion of the display. It slides to the right with some moderate force, then pulls off (pulling perpendicular to the display). If you look at the display from the bottom, you should see two screws on each hinge holding them in place, you just need to tighten the ones that are loose. You may want to temporarily reattach the display to the body while the clutch barrel is still off, just to make sure everything is lined up properly before tightening the screws.
Then just put back the clutch barrel, carefully routing the cables back through and sliding it back into place.